Polaris Code Spn 520207 570 - Your Complete Guide To Diagnosing And

There’s nothing worse. You’re geared up for a day on the trails, you fire up your Polaris, and just as you’re about to hit the dirt, the dreaded check engine light flicks on. Your machine suddenly feels sluggish, unresponsive, and stuck in limp mode. You’ve just been hit with the infamous polaris code spn 520207 570.

We’ve all been there. That sinking feeling can ruin a perfect day of riding. But what if I told you this common code is often a simple fix you can handle yourself with a few basic tools and a little know-how?

In this complete guide from FatBoysOffroad, we’re going to demystify this throttle position sensor code. We’ll break down exactly what it means, show you how to diagnose the root cause like a pro, and walk you through the step-by-step process to get your machine running strong again. Let’s get you back on the trail.

What Exactly is Polaris Code SPN 520207 570? Decoding the Dash

Seeing a string of numbers on your dash can be intimidating, but it’s just your machine’s way of talking to you. Think of it as a specific message telling you exactly where to look. Let’s break it down.

The code is made of two parts:

SPN 520207: This stands for Suspect Parameter Number. The number 520207 specifically points to the Throttle Position Sensor 1 (TPS). This sensor tells your machine’s computer (the ECU) how far you’re pressing the gas pedal.
FMI 5: This is the Failure Mode Identifier. The number 5 means “Current Below Normal or Open Circuit.”

Put it all together, and the polaris code spn 520207 570 means your ECU is getting a voltage signal from the throttle position sensor that is too low, or it’s getting no signal at all. In simple terms, the brain of your machine can’t hear what your foot is telling it to do.

Common Symptoms: How Your Machine Tells You There’s a Problem

When the ECU loses the signal from the TPS, it gets confused and defaults to a safety protocol to protect the engine. This is why you experience such noticeable performance issues.

Here are the most common signs you’re dealing with this specific fault code:

Check Engine Light (CEL): This is your first and most obvious warning.
Limp Mode: The machine will drastically reduce power and limit RPMs to prevent damage. It will feel incredibly sluggish.
Erratic or No Throttle Response: You might press the gas pedal and get a delayed reaction, a jerky response, or nothing at all.
Stalling or Rough Idle: Without a clear signal of the throttle position, the engine can’t properly manage the air-fuel mixture, leading to a rough idle or stalling, especially when you let off the gas.
Difficulty Starting: The ECU uses the TPS reading even during startup, so a bad signal can make it hard to get the engine to fire.

The Usual Suspects: Top 4 Causes of This Throttle Code

While it sounds complex, this code is almost always caused by one of four things. The good news? The most common cause is also the easiest to fix. Here is a complete polaris code spn 520207 570 guide to the potential culprits.

Cause 1: Damaged Wiring and Connectors (The #1 Culprit)

This is, by far, the most common problem. The wiring harness leading to the TPS is exposed to vibration, heat, mud, and water. Over time, a wire can get pinched, rub through its insulation, or break internally.

Cause 2: A Faulty Throttle Position Sensor (TPS)

Like any electronic component, the sensor itself can fail. It’s a moving part, internally, that sweeps across a contact patch. This patch can wear out, creating dead spots where the signal drops out completely, triggering the code.

Cause 3: Corrosion and Moisture Intrusion

We love mud and water, but our electronics don’t. If water gets into the TPS connector, the pins can corrode. This corrosion creates resistance and blocks the electrical signal, making the ECU think there’s an open circuit. This is one of the most common problems with polaris code spn 520207 570.

Cause 4: The Less Common ECU Issue

This is the least likely cause, but it’s possible. In rare cases, the problem isn’t the sensor or the wiring, but the Engine Control Unit (ECU) itself. Before you even consider this, you must rule out the other three possibilities completely.

Your DIY Diagnostic Guide: How to Fix Polaris Code SPN 520207 570

Ready to get your hands dirty? This step-by-step process will help you find and fix the problem. Remember to work carefully and methodically.

Safety First: Before you begin, park your machine on a level surface, turn it off, and disconnect the negative terminal of the battery to prevent any accidental shorts.

Step 1: Gather Your Tools

You don’t need a full professional shop, just a few key items:

Basic socket and wrench set
Torx bit set (many Polaris models use these)
A good quality multimeter
Electrical contact cleaner
Dielectric grease
Flashlight or headlamp
Zip ties and electrical tape

Step 2: The Visual Inspection (Your First and Most Important Check)

Start by locating the throttle body and the TPS mounted on its side. Now, carefully trace the wiring harness from the sensor back as far as you can. Look for:

Pinched Wires: Check where the harness is routed near the frame or engine components.
Frayed or Rubbed Wires: Look for any spots where the black outer sheathing is worn away, exposing the colored wires inside.
Loose Connectors: Ensure the plug is seated firmly onto the TPS.

Step 3: Cleaning and Securing the Connection

This step alone fixes the problem more than half the time. Unplug the connector from the TPS. Use your flashlight to inspect the metal pins inside both the sensor and the plug.

If you see any green or white crusty buildup (corrosion), spray both sides of the connector generously with electrical contact cleaner.
Let it dry completely for a few minutes.
Apply a small dab of dielectric grease to the inside of the plug. This grease prevents moisture and corrosion without interfering with the electrical connection.
Plug the connector back in firmly until you hear it click. Wiggle it to make sure it’s secure.

Following this simple polaris code spn 520207 570 care guide can prevent future issues.

Step 4: Testing the TPS with a Multimeter (The Pro Check)

If cleaning didn’t work, it’s time to test the sensor and wiring. With the connector still plugged in and the battery reconnected, you’ll need to carefully back-probe the wires.

Set your multimeter to DC Volts. You’ll typically find a 5V reference wire, a ground wire, and a signal wire. You want to test the signal wire. With the key on (engine off), you should see a low voltage (around 0.5V-0.7V). As you slowly press the gas pedal, that voltage should climb smoothly to around 4.5V at full throttle. If you see the voltage jump around, drop to zero, or not change at all, you likely have a bad sensor or a broken wire.

Step 5: When to Replace the Throttle Position Sensor

If your wiring looks perfect, the connector is clean, and your multimeter test shows erratic voltage, it’s time to replace the TPS. It’s typically held on with two small Torx screws. Simply unscrew the old one, install the new one, and plug it in.

Best Practices for Prevention: A Sustainable and Eco-Friendly Approach

Fixing a problem is good, but preventing it is better. Adopting a few best practices can save you from future headaches on the trail. This is how you achieve a more sustainable polaris code spn 520207 570 solution.

A “sustainable” repair is one that lasts. When you fix a wire, use heat-shrink tubing for a permanent, waterproof seal. When you check connectors, always add dielectric grease. Secure any loose sections of the wiring harness with zip ties to prevent them from rubbing or vibrating against the frame.

Furthermore, a properly running engine is a more eco-friendly one. The TPS is critical for managing the air-fuel ratio. When it’s working correctly, your engine burns fuel more efficiently, improving gas mileage and reducing emissions. Fixing this code isn’t just about performance; it’s about running a cleaner, healthier machine.

Frequently Asked Questions About Polaris Code SPN 520207 570

Can I still ride my Polaris with this code?

It is strongly not recommended. You’ll be in limp mode with severely limited power, which can be dangerous. More importantly, the unpredictable throttle response and risk of stalling could leave you stranded in a remote or unsafe location.

How much does it cost to fix this code?

The cost varies wildly. If it’s a loose wire or corroded connector, the fix might only cost a few dollars for contact cleaner and dielectric grease. If you need to replace the TPS, the part itself can range from $50 to over $150 depending on your model.

Do I need to clear the code after the repair?

In most cases, yes. After performing the repair, the code may still be stored in the ECU. Sometimes, the light will go off on its own after a few successful ride cycles. Otherwise, you can clear it by disconnecting the battery for about 15-20 minutes or by using an aftermarket diagnostic tool.

Is this the same as a throttle body code?

It’s related but more specific. The Throttle Position Sensor (TPS) is a component mounted on the throttle body. You can have a TPS code without having an issue with the throttle body’s mechanical parts (like the butterfly valve).

Tackling a check engine light can feel daunting, but the polaris code spn 520207 570 is one of the most manageable codes you can encounter. By following a logical process—inspect, clean, test, and replace if needed—you can solve this problem right in your own garage.

You now have the knowledge and the step-by-step guide to diagnose this issue confidently. So grab your tools, get that machine fixed, and get back to what truly matters: exploring the great outdoors. Ride hard and ride safe!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.